Fumigating apparatus



2 Sheets-Sheet 1 VE TOR.

ATTRNEY.

H. ROBERTS FUMIGATING APPARATUS Filed 001;. 5. 1925 Dec. 31, 1929.

Dec. 31, 1929. H. ROBERTS FUMIGATING APPARATUS Filed Oct. 5. 1925 2 Sheets-Sheet 2 m. T N W A TTORNEY.

A ACn Patented Dec. 31, 192,9

urur'rrznl s'rATLEs HUGO ROBERTS, OF `HABANA., CUBA FUMIGATING APPARATUS Application filed October 5, 1925, Serial No. 60,660, and in Cuba March 20, 1925.

This invention relates to the fumigating apparatus of the type that generate a gas which kills the animal life, and its object is to provide an apparatus of this kind, particuf: larly for generating hydrocyanic acid which is being commonly used for killing rats, ants, etc., which apparatus will be of very simple structure, manuable and easily transportable for carrying same closely to the burrows and 10 hills of the rats, ants, etc., and killing such insects and animals in their own burrows and hills. y

The invention is described with reference to the figures of' the annexed drawings, in

l which: n

fFig. 1 isan elevation view in longitudinal section of the apparatus.

Fig. 2 is an upper plan view of the same.

And Fig. 3 is a detail fragmentary view showing one of the glass flasks of the apparatus in outer elevation.

This apparatus comprises a glass flask 1 provided around its neck with a metallic collar formed by two semicircular straps 2 ter- 25 lninated in parallel wings 3 and 4 which are somewhat separated from each other and each wing is provided with a hole across the same so' that each two wings 3, 3 and 4, 4 arranged one in front of the other, may support a horizontal pin 5 for pivoting the head of a screw 6.

Flask 1 is closed at its mouth by a metallic -lid 7 of larger surface than the mouth and the lower face thereof is provided with a rubber disc 8 and thel lid has on its edge two diametrally opposite lugs 9, each one provided with a slot 10 for inserting thereto each screw 6 united to the ycollar and thus lid 7 is secured by means of a nut 11 threaded on the upward `projecting end of screw 6 once the same is turned up and being inserted in the respective slot 10, thus forming a perfect lock.

Lid 7 is crossed by two tubes bent in angle 12 and 13 which are of ebonite or other ma terial. Tube 12 terminates on its inner end near the lower face of lid 7 and at its outer end is connected to a rubber tube 14 terminated in a rubber bulb 15. Tube 13 terminates on its inner end near the lower face of lid 7 and is extended through a *rubber tube 16 tothe bottom `of the flask, and at its other end is connected to the rubber tube 17 which is-for coimnunicating the same with another ask l.

Flask 1 isalso cfglass and is provided at its neck with a metallic collar formed by two semi-circular straps 2 terminated in parallel wings 3 and 4 which 'are somewhat separated from each other, andreach wing is provided with a'hole across the `same so that each two wings 3', 3 and 4, 4 arranged one in front of the other may support a horizontal pin 5 for pivotingthe screw 6.

Flask 1 is closed at its lmouth Jby a metalll-iellid 7 which is of the same construction as lid 7iof flask 1, that is, which is provided with diametrallyopposite lugs L9 each-one provided with a #slot 10 for inserting "thereto each screw Glon whose ends lis threaded a nut lllandflid 7 `is alsoprovided at its lower face with a rubber disc 8.

Lid 7 is crossed Lby two tubes bent .infangle 18 `and 19 which are made of ebonite or other material. Tube 18 terminates at its inner end near the inner face of the lid and is extended through a rubber tube 20 reaching near the bottom of flask 1 and is provided near the lid with a small hole 21, and at its outer end said angular tube 18 is connected to the rubber tube 17. before mentioned, and besides it is provided with a cock 22 arranged near lid 7, and angular tube 19 terminates at its inner end near the lower face of the lid and at its outer endis connected to a rubber tube 23 which is of convenient length and terminates in a nozzle 24.

For generating hydrocyanic acid, there is poured into flask 1 water acidulated with sulphuric acid and into flask 1 is poured an alkaline cyanide such as potash cyanide, and both flasks are hermetically closed by means of lids 7 and 7 respectively. By pressing with the hand the rubber bulb 15 and opening previously the cock 22, the pressure is exerted into flask 1 and the acidulated water runs up through rubber tube 16 and passes through tubes 13, 17, 18 and 20 on the bottom of flask 1` where the chemical reaction is elfected and the produced hydrocyanic acid escapes through tube 19', passing to tube 23 and nozzle 24 and with which the burrows and hills of rats, ants and other vermin and insectn pests can be injected for killing the saine.

With this apparatus, and by changing the reagents, can also be produced carbonic acid, hydrogen, chlorine and any other simple gaseous body.

The object of cock 22 is to insulate one flask from the other in case the reaction be too active, and the object of hole 21 of tube 2O is for equilibrating the pressure inside and outside of said rubber tube 20, preventing passage of liquid to fiask l due to a higher pressure in flask l.

This apparatus is inclosed preferably within a case of wood, and can be used inserted therein.

It is obvious that the details of construction of the apparatus can be altered Without altering the essential character or spirit of the invention, which is as claimed in the appended claim.

What I claini is :V-

Fuinigating apparatus comprising a pair of containers each having a detachable closure, a duct connecting said receptacles, said duct being provided with a valve and eX- tending through and being carried by said closures and including an arni extending downwardly to near the bottom of each receptacle, means for injecting a liquid into one of the receptacles and including a duct eX tending through and carried by the closure of said receptacle and a discharge duct carried by and extending through the closure of the other receptacle.

In Witness whereof I aiX my si gnature.

- HUGO ROBERTS. 

